C. Not working
C1. To go/ be on strike (industrial dispute)
C2. To get the sack (thrown out of your job)
C3. To be fired (more formal than ‘get the sack’; often used as a direct address: ‘You’re fired!’)
C4. To be made redundant (thrown out, no longer needed)
C5. To be laid off (more informal that ‘made redundant’)
C6. To give up work (e.g. in order to study)
C7. To be on/ take maternity (woman) or paternity (man) leave (before/ after the birth of a baby)
C8. To be on/ take sick leave (illness)
C9. To take early retirement (retire at 55)

D. Other useful expressions
D1. To be a workaholic (love work too much)
D2. To be promoted (get a higher position)
D3. To apply for a job (fill in forms, etc.)

(Source: English Vocabulary in Use, Cambridge University Press)